Edward barrett



(No Model.)

E. BARRETT.

KEY HOLE GUARD.

Patented Dec. '25, 1888:.v

Lil

FFIEEQ PATENT ED\VARD BARRETT, OF FALL RIVER, MASSACHUSETTS, ASSIGNOR TO GEORGE R. IIADDOOK, OF SAME PLACE.

KEY-HOLE GUARD.

SPECIFICATION forming part of Letters Patent No. 395,259, dated December 25, 1888. Application filed March 6, 1888. Serial No. 266,226. (No model.)

To all whom it may 0072-06772:

Be it known that I, EDWARD BARRETT, of Fall River, in the county of Bristol, State of Massachusetts, have invented a'certain, new and useful Improvement in Key-Hole Guards, of which the following is a description suftieiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertaius to make and use the same, reference being had to the accompanying (llrawings, forming part ol this specifica tion, in which- Figure l is a side elevation showing a lock in use provided with my improvement, apo'rtion of the door being represented as broken away; Fig. 2, a side elevation of my improved look as viewed from the inner side of the door, a portion of the door being represented as removed to expose the lock; Fig. 3, a side elevation of the same as viewed from the outer side of the door, a portion of the door being represented as removed to expose the look; Fig. 4, a rear elevation of the lock detached from the door; Fig. 5, a vertical transverse section of the lock, taken on the line :1: a: in Fig. 5, certain parts being shown in side elevation; llig. (i, an elevat ion, partly in section, shmving certain details of construction; and Fig. 7, an enlarged elevation of a portion of the escutcheon.

Like letters and figures of reference indicate corresponding parts in the different u res ot' the drawings.

My invention relates to that class of mortise door-locks which are provided with means for preventing the keys from being turned and the door unlocked from the outside by burglars, thieves, &c.; and it consists in the novel features hereinafter fully set forth and claimed, the object being to provide a simpler, cheaper, and more eil'wtive article of this character than is now in ordinary use.

The nature and operation of the improve ment will be readily mulerstood by all conversant with such matters from the following explanation.

In the d rawings, A represents the body or case of the lock, which is provided with a spring-bolt, C, key-holef, and hole B, for the spindle of the knob D in the usual manner, all of these parts being of the ordinary form and construction, excepting as hereinafter specified. A flat curved bar, E, is pivoted at m to the inner side of the body A, the free end if of said bar projecting through a slot, 4;, formed in the rear wall and bottom of said body, as best seen in Fig. 5. A rod, H, has its inner end jointed to the free end tof the bar E in such a manner as to permit it to be moved vertically, but not laterally, independently of the bar. A slot, g, is formed in the sides of the body A, to permit the rod I-I free vertical and lateral movements to such an extent as to perform its functions properly. This slot is extended through the inner side of the door J, an escutcheon, N, being applied to the door within the room. The escutcheon N is provided with a key-hole, which registers with the key-hole fot the lock, and also with a slot, 10, which registers with the slot g in the door and body of the lock. The escutcheon is also provided at the ends of the slot U) with re cesses d p, (see Fig. 7,) into which the rod H falls when the bar E is swung to its fullest extent in either direction. The rod H is formed in two parts, the outer portion being exteriorly screw-threaded at its inner end and screwed into a corresponding socket, y, in the inner portion, thereby enabling the outer portion to be readily detached to permit the removal of the look from the door.

In the use of my improvement the key is inserted in the look from the inner side of the door, and the door locked in the usual manner. The rod II is then swung to the right in the slot to of the escutcheon N and dropped into the recess (7, thereby moving the bar E into position to cover the key-holefinside the body A, as shown by the dotted lines in Fig. 5, and securely locking said bar in that position. \Vhenever it is desired to leave the room and lock the door on the outer side, the rod H is raised from the recess (Z and the bar E swung back from over the key-hole and secured in that position by being dropped into the recess p, after which the key maybe inserted in the look from the outer side of the door and the door locked in a manner that will be readily understood by all conversant with such matters without a more explicit description.

If desired, the body of the lock may be made of suflieient size to entirely house the bar E, thereby obviating the necessity of providing it with the slot Q.

It will be understood that the bar E is pivoted to that side of the body A which is farthest from the room, and that the key is of such length as not to interfere with said bar when it is swung into position over the keyhole. It will also be understood that the improvement is equally well adapted for either right or left hand locks, the direction or incline of the slots for the rod II and the arrangement of the bar ll being varied accordingly.

In Figs. 2and 5 the outer portion of' the rod H is represented as detached from the socket y in its inner or jointed portion.

EDXVARD BARRETT.

\Vitnesses:

MARCUS G. B. SWIFT, NICHOLAS ITATHWAY, J 1'. 

